DR. DOUGLAS J GRUNWALD (MD) – Gastroenterology Physician, NPI 1154616001
Gastroenterology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
401 GASTROENTEROLOGY in CT
Provider Addresses for DR. DOUGLAS J GRUNWALD (MD)
2200 WHITNEY AVE STE 360
HAMDEN, CT 065183602
Phone: (203) 281-4463
Fax: (203) 287-2930
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 98 Open Payments records for all available years, with a total value of $1,925.
Total Amount is formed as General ($1,925) + Research ($0) + Ownership ($0) = $1,925.
Last reported payment date: 2024-12-10 • Largest payer in this snapshot: ABBVIE INC. ($542).
Total Amount
$1,925
General + Research + Ownership
Payments
98
Total payment records
General Amount
$1,925
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $542 |
| Ardelyx, Inc. | $172 |
| Takeda Pharmaceuticals U.S.A., Inc. | $168 |
| QOL Medical, LLC | $150 |
| Celgene Corporation | $89 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2017-05-09
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20170509001639 | I | Gastroenterology | CT | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 97 | 77 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 57 | 57 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 54 | 46 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 38 | 38 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 34 | 34 | $0 |
Insurance plans in this area (ZIP 06518)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| - | CT |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.